5. A convex lens has a focal length of 10 cm. At what distance from the lens should the object be placed so that it forms a real and inverted image 20 cm away from the lens? What would be the size of the image formed if the object is 2 cm high? With the help of a ray diagram show the formation of the image by the lens in this case.
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Explanation:
f = +10 cm, v = +20 cm as image is real and inverted. Height of the object = 2 cm. (say+ve)
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